#![deny(unused_must_use)]

extern crate elefren;
#[macro_use]
extern crate log;
#[macro_use]
extern crate serde;
// #[macro_use]
// extern crate smart_default;
#[macro_use]
extern crate thiserror;

use clap::Arg;
use log::LevelFilter;

use crate::store::{NewGroupOptions, StoreOptions};
use crate::utils::acct_to_server;

mod command;
mod error;
mod group_handler;
mod store;
mod utils;

#[tokio::main]
async fn main() -> anyhow::Result<()> {
    let args = clap::App::new("groups")
        .arg(
            Arg::with_name("verbose")
                .short("v")
                .multiple(true)
                .help("increase logging, can be repeated"),
        )
        .arg(
            Arg::with_name("config")
                .short("c")
                .long("config")
                .takes_value(true)
                .help("set custom storage file, defaults to groups.json"),
        )
        .arg(
            Arg::with_name("auth")
                .short("a")
                .long("auth")
                .takes_value(true)
                .value_name("HANDLE")
                .help("authenticate to a new server (always using https)"),
        )
        .arg(
            Arg::with_name("reauth")
                .short("A")
                .long("reauth")
                .takes_value(true)
                .value_name("HANDLE")
                .help("authenticate to a new server (always using https)"),
        )
        .get_matches();

    const LEVELS: [LevelFilter; 5] = [
        LevelFilter::Error,
        LevelFilter::Warn,
        LevelFilter::Info,
        LevelFilter::Debug,
        LevelFilter::Trace,
    ];

    let default_level = 2;

    let level = (default_level + args.occurrences_of("verbose") as usize).min(LEVELS.len());

    env_logger::Builder::new()
        .filter_level(LEVELS[level])
        .write_style(env_logger::WriteStyle::Always)
        .filter_module("rustls", LevelFilter::Warn)
        .filter_module("reqwest", LevelFilter::Warn)
        .init();

    let store = store::ConfigStore::new(StoreOptions {
        store_path: args.value_of("config").unwrap_or("groups.json").to_string(),
        save_pretty: true,
    })
    .await?;

    if let Some(handle) = args.value_of("auth") {
        let handle = handle.to_lowercase();
        let acct = handle.trim_start_matches('@');

        if store.group_exists(acct).await {
            anyhow::bail!("Group already exists in config!");
        }

        if let Some(server) = acct_to_server(acct) {
            let g = store
                .auth_new_group(NewGroupOptions {
                    server: format!("https://{}", server),
                    acct: acct.to_string(),
                })
                .await?;

            eprintln!("New group @{} added to config!", g.config.get_acct());
            return Ok(());
        } else {
            anyhow::bail!("--auth handle must be username@server, got: \"{}\"", handle);
        }
    }

    if let Some(acct) = args.value_of("reauth") {
        let acct = acct.trim_start_matches('@');
        let _ = store.reauth_group(acct).await?;
        eprintln!("Group @{} re-authed!", acct);
        return Ok(());
    }

    // Start
    let groups = store.spawn_groups().await;

    let mut handles = vec![];
    for mut g in groups {
        handles.push(tokio::spawn(async move { g.run().await }));
    }

    futures::future::join_all(handles).await;

    eprintln!("Main loop ended!");
    Ok(())
}